@article{PMF_1913_24_1_a6,
     author = {Kreutz, St.},
     title = {Zale\.zno\'sci w{\l}asno\'sci optycznych kryszta{\l}\'ow mieszanych od sta{\l}ych optycznych i od stosunku sk{\l}adnik\'ow},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {337--351},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {1913},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1913_24_1_a6/}
}